[go: up one dir, main page]

RU1828458C - Method of roastingless filler making - Google Patents

Method of roastingless filler making

Info

Publication number
RU1828458C
RU1828458C SU884356255A SU4356255A RU1828458C RU 1828458 C RU1828458 C RU 1828458C SU 884356255 A SU884356255 A SU 884356255A SU 4356255 A SU4356255 A SU 4356255A RU 1828458 C RU1828458 C RU 1828458C
Authority
RU
Russia
Prior art keywords
fly ash
granules
ash
water
aggregate
Prior art date
Application number
SU884356255A
Other languages
Russian (ru)
Inventor
Йоханнес Спанйер Якобус
Дирк Радемакер Питер
Original Assignee
Арделит Холдинг Б.В.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Арделит Холдинг Б.В. filed Critical Арделит Холдинг Б.В.
Priority to LV920615A priority Critical patent/LV5112A3/en
Application granted granted Critical
Publication of RU1828458C publication Critical patent/RU1828458C/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02—Selection of the hardening environment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S106/00—Compositions: coating or plastic
    • Y10S106/01—Fly ash
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/49—Processes of using fly ash

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Ceramic Products (AREA)
  • Glass Compositions (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Glanulating (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Braking Arrangements (AREA)

Abstract

A mixture of inorganic binder, water and fly ash is granulated; the formed granules (7) are deposited upon a continuously supplied layer of fly ash embedding material (9) and said fly ash layer together with granules is fed into a hardening reactor (14). The granules are hardened by injecting steam (16) into the reactor so that the temperature of the granules is raised and maintained at a temperature comprised between 50 and 100 DEG C. After curing the hardened granules are separated from the embedding material which is used for forming new granules. The embedding material has a water absorbing capacity of 15-25% and the pH of the moist embedding material is above 4.

Description

Изобретение относитс  к изготовлению безобжигового заполнител , преимущественно из золы от сжигани  угл  или лигнита с добавкой св зующего и воды.FIELD OF THE INVENTION This invention relates to the manufacture of a non-calcined aggregate, mainly from ash from the combustion of coal or lignite with the addition of a binder and water.

Цель изобретени  - повышение прочности заполнител .The purpose of the invention is to increase the strength of the aggregate.

Способ осуществл ют следующим образомThe method is as follows

Зольную пыль теплоэлектростанций от сжигани  угл  смешивают с порошкообразной известью быстрого гашени  и водой до получени  однородной массы, которую гранулируют до размера гранул 7,9 - 10 мм. Сформованные зольные гранулы смешивают с зольной пылью, имеющей водопогло- щение не менее 10%, преимущественно 15 - 25%, и при их объемном соотношении 1 : (0,2 - 1), предпочтительно 1 : 0,4, подвергают твердению в вертикальных тепловых камерах непрерывного действи  в среде вод ного пара преимущественно при температуре 71 - 100°С При введении зольных гранул во влажную зольную пыль процесс ведут при рН увлажненной пыли свыше 4The fly ash of thermal power plants from burning coal is mixed with powdered quicklime lime and water until a homogeneous mass is obtained, which is granulated to a granule size of 7.9-10 mm. Formed fly ash granules are mixed with fly ash having a water absorption of at least 10%, preferably 15 to 25%, and when their volume ratio is 1: (0.2 - 1), preferably 1: 0.4, they are hardened in vertical heat chambers of continuous action in the environment of water vapor, mainly at a temperature of 71-100 ° C. When ash granules are introduced into wet ash dust, the process is conducted at a pH of moistened dust above 4

В таблице приведены конкретные примеры реализации способа со свойствами получаемого заполнител  из отвержденных зольных гранул.The table shows specific examples of the method with the properties of the obtained aggregate from the cured ash granules.

После тепловлажностной обработки от- вержденные зольные гранулы имеют насыпную плотность 900 - 1050 кг/м , прочность при сжатии составл ет 3,5 - 3,9 МПа.After heat and moisture treatment, the cured ash granules have a bulk density of 900–1050 kg / m, and the compressive strength is 3.5–3.9 MPa.

Способ обеспечивает равномерное твердение гранул без образовани  трещин при исключении конденсации пара на их поверхности, что позвол ет сохранить плотность наружных слоев гранул и тем самым повысить их прочностьThe method provides uniform hardening of the granules without cracking, with the exception of steam condensation on their surface, which allows to maintain the density of the outer layers of the granules and thereby increase their strength

0000

юYu

0000

СЛ :00SL: 00

,CJCJ

Гранулы можно подавать на слой зольной пыли, а затем вводить их в тепловую камеру. Пар можно подавать в тепловую камеру после загрузки смеси заполнител  и зольной пыли. В качестве св зующего воз- можно использование гидрооксида кальци , известкового молока или цемента. Заполнитель можно изготавливать из смеси извести, золы, песка и воды или из смеси, извести, золы, дигидрида сульфата кальци  и воды.Granules can be fed to a layer of fly ash, and then introduced into a heat chamber. Steam can be fed into the heat chamber after loading the aggregate and fly ash mixture. As a binder, calcium hydroxide, milk of lime or cement may be used. The aggregate may be made from a mixture of lime, ash, sand and water, or from a mixture of lime, ash, calcium sulfate dihydride and water.

Claims (8)

Формула изобретени  1. Способ изготовлени  безообжигово- го заполнител  преимущественно из золы от сжигани  угл  или лигнита с добавкой св зующего и воды путем формовани  гранул и последующего твердени  в вертикальных тепловых камерах непрерывного действи  в среде вод ного пара при 29,4 - 100°С, отличающийс  тем, что, целью повышени  прочности заполнител , сфор- мированнные зольные гранулы предварительно смешивают с зольной пылью с водопоглощением не менее 10% при их объемном соотношении 1 : (0,2 - 1), а процесс ведут при рН влажной зольной пыли более 4.SUMMARY OF THE INVENTION 1. A method of manufacturing a non-fired aggregate mainly from ash from the burning of coal or lignite with the addition of a binder and water by molding granules and subsequent hardening in vertical heat chambers of continuous action in the environment of water vapor at 29.4-100 ° C, characterized in that, in order to increase the strength of the aggregate, the formed ash granules are pre-mixed with fly ash with a water absorption of at least 10% at a volume ratio of 1: (0.2 - 1), and the process is carried out at a pH of wet fly ash more than 4. 2.Способ по п.1,отличающийс  тем, что гранулы заполнител  предварительно подают на слой зольной пыли, а затем ввод т их в тепловую камеру.2. The method according to claim 1, characterized in that the aggregate granules are first fed to the fly ash layer and then introduced into the heat chamber. 3.Способ по п.1.отличающийс  тем, что пар подают в камеру после загрузки смеси заполнител  и зольной пыли.3. The method according to claim 1, characterized in that the steam is fed into the chamber after loading the mixture of aggregate and fly ash. 4.Способ по п.1,отличающийс  тем, что твердение ведут при 71 - 100°С.4. The method according to claim 1, characterized in that the hardening is carried out at 71-100 ° C. 5.Способ по п.1,отличающийс  тем, что соотношении гранул заполнител  и зольной пыли составл ет предпочтительно 1 : 0,4.5. The method according to claim 1, characterized in that the ratio of aggregate to fly ash granules is preferably 1: 0.4. 6.Способ по п.1,отличающийс  тем, что водопоглощение зольной пыли составл ет 15-25%.6. The method according to claim 1, characterized in that the water absorption of fly ash is 15-25%. 7.Способ по п. 1. отличающийс  тем, что в качестве св зующего при изготовлении гранул используют гидроксид кальци , или известковое молоко, или цемент.7. A method according to claim 1. characterized in that calcium hydroxide or milk of lime or cement is used as a binder in the manufacture of granules. 8.Способ по п.1,отличающийс  тем, что заполнитель изготавливают из смеси извести, золы, песка и воды, или из смеси извести, золы, воды и других продуктов сгорани , или из смеси извести, золы, дигидра- та сульфата кальци  и воды.8. The method according to claim 1, characterized in that the aggregate is made from a mixture of lime, ash, sand and water, or from a mixture of lime, ash, water and other combustion products, or from a mixture of lime, ash, calcium sulfate dihydrate and water. Наименование показателейThe name of indicators Вид компонентов и их расход на приготовление сырьевой смеси, кг: Type of components and their consumption for the preparation of the raw mix, kg: зольна  пыльfly ash известьlime дигидрат сульфата кальци calcium sulfate dihydrate водаwater Объемное соотношение гранул с зольно пыльюVolume ratio of granules with fly ash рН влажной зольной пыли Температура твердени  зольных гранул, ° Водопоглощение зольной пыли, % Характеристика зольного грави  после тепловой обработки:pH of wet fly ash Hardening temperature of fly ash granules, ° Water absorption of fly ash,% Characteristics of fly ash after heat treatment: оabout Плотность насыпани , кг/м прочность, МПаDensity, kg / m strength, MPa Известный способKnown method 1,921.92 1,21,2 17,617.6 1:11: 1 7,0 100 257.0 100 25 900-1050 3,5900-1050 3.5 750-950 0,4-1,0750-950 0.4-1.0
SU884356255A 1987-07-22 1988-07-21 Method of roastingless filler making RU1828458C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LV920615A LV5112A3 (en) 1987-07-22 1992-12-30 Uncooked filler gain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/076,313 US4880582A (en) 1987-07-22 1987-07-22 Hardening granulated material at elevated temperatures

Publications (1)

Publication Number Publication Date
RU1828458C true RU1828458C (en) 1993-07-15

Family

ID=22131192

Family Applications (1)

Application Number Title Priority Date Filing Date
SU884356255A RU1828458C (en) 1987-07-22 1988-07-21 Method of roastingless filler making

Country Status (14)

Country Link
US (1) US4880582A (en)
EP (1) EP0301661B1 (en)
JP (1) JPH0813694B2 (en)
CN (1) CN1026665C (en)
AT (1) ATE88685T1 (en)
AU (1) AU600842B2 (en)
CA (1) CA1313030C (en)
DE (1) DE3880575T2 (en)
ES (1) ES2040831T3 (en)
IL (1) IL87143A (en)
LT (1) LT3819B (en)
RU (1) RU1828458C (en)
UA (1) UA11074A (en)
ZA (1) ZA885350B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5137753A (en) * 1990-10-25 1992-08-11 Bland Alan E Pelletizing ash
US5211750A (en) * 1991-06-19 1993-05-18 Conversion Systems, Inc. Synthetic aggregate and landfill method
FR2693927B1 (en) * 1992-07-24 1994-10-07 Philippe Pichat Process and apparatus for obtaining stabilized molded materials from waste.
US5364572A (en) * 1993-01-28 1994-11-15 Consolidation Coal Company Process for making high-strength synthetic aggregates
US5584895A (en) * 1994-04-18 1996-12-17 Ngk Insulators, Ltd. Process for preparing solidified material containing coal ash
EP0784035A1 (en) * 1995-12-22 1997-07-16 Hoogovens Technical Services Energy & Environment BV Method for processing particulate materials into hardened granules
BR9611315A (en) * 1995-11-06 1999-12-28 Aeci Ltd Method of preparing hardened granules from a particulate material.
NL1005470C2 (en) * 1997-03-07 1998-09-08 Recycling Mij Feniks B V General construction material production from waste materials
US6334895B1 (en) 1998-07-20 2002-01-01 The University Of Wyoming Research Corporation System for producing manufactured materials from coal combustion ash
US6054074A (en) * 1998-09-22 2000-04-25 Consol, Inc. Method for making manufactured aggregates from coal combustion by-products
SE529971C2 (en) * 2005-03-23 2008-01-22 Delta Of Sweden Ab A material mixture comprising particles or grains and a binder consisting of at least two components
US7459411B2 (en) * 2005-10-14 2008-12-02 B.B.B.-Development And Production Of Building Products Ltd. Ceramic building elements
GB0621467D0 (en) * 2006-10-27 2006-12-06 Geodur Internat Ag Improvements relating to residues
WO2019167036A1 (en) 2018-02-27 2019-09-06 Dead Sea Works Ltd. Potash dust granulation process
WO2019217919A1 (en) 2018-05-10 2019-11-14 Ash Management Engineering, Inc. Methods and systems for multi-stage encapsulation of wastes and production thereof into aggregate products
US12195409B2 (en) 2018-11-23 2025-01-14 Icl Europe Cooperatief U.A. Compacted Polyhalite and a process for the production thereof

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438303A (en) * 1973-11-17 1976-06-03 Iu Conversion Systems Cementitious compositions and methods of making them
US4264543A (en) * 1977-03-08 1981-04-28 Oil-Dri Corporation Of America Process for manufacturing synthetic gypsum absorbent granules
NL7714619A (en) * 1977-12-30 1979-07-03 Loggers Hendrik PROCESS FOR THE MANUFACTURE OF HYDROTHERMALLY HARDENED PRODUCTS.
DE2801687A1 (en) * 1978-01-16 1979-07-19 Bautrans Finanz Ag Binder contg. high percentage of fly ash - employed to make high strength concrete or concrete mouldings
US4219519A (en) * 1979-03-08 1980-08-26 Board Of Control Of Michigan Technological University Method for agglomerating carbonaceous fines
US4399176A (en) 1980-03-31 1983-08-16 Pretty Products, Inc. Automotive floor mat having rigid rib
DE3177254D1 (en) * 1980-04-17 1991-10-02 Aardelite Holding Bv METHOD FOR PRODUCING BODIES.
NL8200193A (en) * 1982-01-20 1983-08-16 Hendrik Loggers Prinses Beatri Hardening particles contg. combustion ash and calcium hydroxide - at elevated temp. in storage silo
US4394176A (en) * 1982-01-21 1983-07-19 Aarding Weerstandlas B.V. Method of producing silicate-containing granulates
GB2128178B (en) * 1982-10-01 1986-01-08 Bryan James Walker Lightweight aggregate
US4480178A (en) 1983-04-04 1984-10-30 At&T Information Systems Tuning arrangement for interfacing credit card-like device to a reader system
GB2159143B (en) * 1984-04-12 1987-06-17 Granulite Ltd Lightweight aggregate
NL8503127A (en) * 1985-11-13 1987-06-01 Aardelite Holding Bv METHOD FOR MANUFACTURING COAL AXLE BUILDING MATERIAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 1440885, кл. С 04 D 14/06, 1986. Баженов Ю.М. и др. Безобжиговый зольный гравий - новый эффективный заполнитель дл бетонов - Строительные материалы, 1980, № 8, с. 19 - 20. *

Also Published As

Publication number Publication date
EP0301661B1 (en) 1993-04-28
AU600842B2 (en) 1990-08-23
EP0301661A2 (en) 1989-02-01
DE3880575T2 (en) 1993-09-23
ES2040831T3 (en) 1993-11-01
ZA885350B (en) 1989-05-30
EP0301661A3 (en) 1990-02-07
US4880582A (en) 1989-11-14
CN1026665C (en) 1994-11-23
UA11074A (en) 1996-12-25
IL87143A (en) 1991-11-21
LT3819B (en) 1996-03-25
DE3880575D1 (en) 1993-06-03
IL87143A0 (en) 1988-12-30
JPH0813694B2 (en) 1996-02-14
JPS6451361A (en) 1989-02-27
ATE88685T1 (en) 1993-05-15
AU1925088A (en) 1989-01-27
CA1313030C (en) 1993-01-26
LTIP1772A (en) 1995-07-25
CN1032116A (en) 1989-04-05

Similar Documents

Publication Publication Date Title
RU1828458C (en) Method of roastingless filler making
US4780144A (en) Method for producing a building element from a fly ash comprising material and building element formed
EP0120921B1 (en) Lightweight aggregate
JPH0829964B2 (en) Process for producing hardenable mixture containing coal ash and hardened coal ash containing granules and building component containing coal ash
JPS5844627B2 (en) Manufacturing method of fireproof insulation material
SU1573009A1 (en) Method of manufacturing hollow unburned aggregate
RU2148043C1 (en) Raw mixture and method of manufacturing nonfired light-weight filler
RU2067569C1 (en) Method for autoclave-free manufacture of foam-concrete building products
CA1077972A (en) Hydrothermally treated material containing olivine
SU1071599A1 (en) Lightweight ash gravel
CZ176994A3 (en) Process of treating sulfur-containing residues and fly ash to hardenable granules, preparation of cement-free mortar and the use of such granules and mortar for manufacture of building shaped blocks
RU2001115313A (en) A method of manufacturing wood concrete
CN116986864B (en) Ceramsite-based porous ecological concrete and preparation method thereof
SU1263679A1 (en) Method for manufacturing roastless building products
SU1209640A1 (en) Raw mix for producing porous aggregate
SU1726422A1 (en) Method of producing light filler
JPH05170567A (en) Method for manufacturing foamed and baked products
SU1011597A1 (en) Raw mix for preparing light-weight aggregate
JPS59199564A (en) Manufacture of calcium silicate type heat resistant material
SU1528758A1 (en) Method of producing hollow aggregate
SU1008203A1 (en) Raw mix for making heat insulating products
RU1785521C (en) Thermic insulating mixture making method
SU1726417A1 (en) Stock for producing filler
SU1413079A1 (en) Method of producing unroasted gravel
SU1474124A1 (en) Initial composition for producing unfired binder

Legal Events

Date Code Title Description
REG Reference to a code of a succession state

Ref country code: RU

Ref legal event code: MM4A

Effective date: 20020722